Attention and Attention Management have a lot to do with Cognitive Science. We never talk about the academics of perception etc here but I thought this picture was a great example.

The picture itself is funny - in fact that's why it was sent to me in the first place. But if you think about it - the only reason you have any clue what's going on is the negative space on the bottom right and the light next to it. From this little piece of data, our brain fills in a full picture, puts it in context with a set of circumstances that together make it funny to us.